Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 850

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-850 A Big Rock IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-850 0 Big Rock IL   145J TERRA NOVA TELECOM INC. 358      
331-850 1 Big Rock IL CHCGILWUKMD  939H COMMIO, LLC 358      
331-850 3 Big Rock IL   318J COMCAST IP PHONE, LLC 358      
331-850 5 Big Rock IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-850 7 Big Rock IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-850 8 Big Rock IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358      
331-850 9 Big Rock IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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